Comparison

CarX vs OpenOBD

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CarX

Features
Read full description

CarX -- Your AI Car Agent Instant AI health status for your car. In plain English. QUICK SCAN Plug in any Bluetooth OBD-II adapter, tap Quick Scan, and CarX reads every sensor and fault code in seconds. Auto-disconnects when done. Your car's health -- captured instantly. AI THAT UNDERSTANDS YOUR CAR Ask anything in plain English. "Is my car safe to drive?" "What does this warning light mean?" "Should I be worried about my battery?" CarX AI answers like a mechanic you trust. REPAIR COST ESTIMATES Every fault code comes with estimated UK repair costs, drive safety advice, and common causes. Know what you're dealing with before you visit the garage. THINGS GOING WRONG. THINGS GETTING WORSE. CarX AI doesn't just read codes. It spots trends, predicts what's coming, and tells you what to do about it. Predictive alerts keep you ahead of breakdowns. DETAILED INSTANT REPORTS Generate comprehensive health reports with one tap. AI-analysed, plain English, sharable. Reports that can't be faked -- backed by real OBD-II data. AUDIO HEALTH REPORTS Get a spoken summary of your car's health. Listen while you drive. Premium feature. LIVE DASHBOARD Real-time gauges for RPM, speed, coolant temperature, battery voltage, fuel level, and engine load. All from your car's own sensors. Works with any Bluetooth (BLE) OBD-II adapter. We recommend Veepeak BLE adapters for the best experience. Compatible with most cars from 2003 onwards. Free to download. Premium features available with optional subscription. CarX by CyberSecAI Ltd. Patent Pending.

About

OpenOBD

Transform your iPhone into a real-time car dashboard. Connect an OBD2 adapter to monitor live engine data, track your trips with GPS, and diagnose fault codes with clear explanations. Explore all features in demo mode without hardware.

Highlights
  • Live engine data monitoring
  • Real-time speed, RPM, temperature gauges
  • Trip logging with GPS mapping
  • Read and clear diagnostic trouble codes (DTCs)
  • Vehicle information display
  • Demo mode for exploration
Features
Read full description

OpenOBD turns your iPhone into a real-time car dashboard. Connect any ELM327 OBD2 adapter (Bluetooth or Wi-Fi) and see what your car is really doing — live. LIVE ENGINE DATA • Speed, RPM, coolant temperature, intake, throttle, engine load, battery voltage and more • 50+ sensors with gauges you pick and reorder yourself • Instant and average fuel consumption • Tap any gauge for a live 60-second chart CARPLAY • A live 8-tile dashboard on your car's built-in screen • Start and stop trip recording without touching your phone DIAGNOSTICS • Read and clear fault codes (DTCs) with plain-language explanations • For common codes: what it means, how urgent it is, what to do next • Emissions readiness monitors before an inspection • Freeze frame — the sensor values from the moment the fault occurred • Vehicle info: VIN, fuel type, supported sensors TRIP LOGGING • Automatically record your drives with the GPS route on a map • Keeps recording in the background, even with the screen locked • Distance, duration, speed and fuel for every trip • Export any trip as CSV or GPX CAR HEALTH TOOLS • Battery and charging test: state of charge, alternator and cranking check • Diesel and DPF pre-check from standard, read-only OBD evidence • Used car check before you buy • Measure 0-100 km/h acceleration and 100-0 km/h braking • Live alerts for overheating and low voltage, in plain language BUILT FOR DRIVERS • Beautiful dark interface designed for the car • Over 40 languages, metric and imperial units • Works with affordable ELM327 adapters — no subscription, no account, no ads • Your data stays on your phone TRY IT WITHOUT HARDWARE • Tap Connect, then Demo Mode, to explore every feature with simulated live data OpenOBD is not affiliated with any car manufacturer. An OBD2 adapter (sold separately) is required to read data from your vehicle. Most petrol cars built after 2001 and diesels after 2004 are supported. The battery, diesel and used-car results are read-only pre-checks and do not replace a professional inspection.

Screenshots

CarX4 screens
OpenOBD4 screens

Verdict

The call

The clearest difference is update cadence: CarX at daily against OpenOBD's every 5 days. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CarX ships an update daily, OpenOBD every 5 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
CarX versus OpenOBD: the parameters behind the verdict, then further details
ParameterCarXOpenOBD
PriceFreeFree
Rating—4.8 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyDaily — betterEvery 5 days
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhoneiPhone, iPad — better
Requires iOS17.016.4 — better
Further details — not scored
Size2 MB54 MB
Age rating4+4+
Developerraza sharifOsman Cengeri

In-app purchases

None

CarX

No in-app purchases

None

OpenOBD

No in-app purchases

Questions

Is CarX free?
CarX is free to download, with no in-app purchases.
Is OpenOBD free?
OpenOBD is free to download, with no in-app purchases.
Do CarX or OpenOBD have ads?
Neither CarX nor OpenOBD shows ads.
Which is updated more often, CarX or OpenOBD?
CarX ships an update daily, and OpenOBD every 5 days. Most recently, CarX was updated on November 9, 2026 and OpenOBD on October 31, 2026.

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